/Engine/Source/Developer/CollectionManager/Public/ICollectionManager.h
Check to see if the given object exists in the given collection
true if the object is in the collection.
bool IsObjectInCollection ( const [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) & ObjectPath, [FName](API\Runtime\Core\UObject\FName) CollectionName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) ShareType, [ECollectionRecursionFlags::Flags](API\Developer\CollectionManager\ECollectionRecursionFlags\Flags) RecursionMode ) const